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Document changing view indices after construction as undefined behavior. #59591

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Document changing view indices after construction as undefined behavior. #59591

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GunnarFarneback
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Cf. https://discourse.julialang.org/t/is-it-defined-behavior-to-modify-iter-while-for-looping-over-it/132477/11?u=gunnarfarneback

julia> v = collect(1:7);

julia> i = collect(1:7);

julia> w = view(v, i);

julia> i[end] = 0;

julia> w[end]
128974949945120

@nsajko nsajko added docs This change adds or pertains to documentation arrays [a, r, r, a, y, s] labels Sep 18, 2025
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